fix(deps): security issues wrt black and starlette

BREAKING CHANGE: bump min Python to 3.9 for black 24+ support

Author: edeckers

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ "3.8", "3.9", "3.10" ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
     name: Run tests for Python ${{ matrix.python-version }}
     steps:
       - uses: actions/checkout@v2